.header{
    height: 0;
}
.container{
    width: 100%;
    background: url(../images/cartoonbg.jpg) no-repeat;
    background-size: 100%;
}
.container .content{
    width: 1500px;
    margin: 0 auto;
    padding: 200px 0;
}
.container .content .item{
    display: inline-block;
    width: 400px;
    height: 220px;
    border-radius: 5px;
    overflow: hidden;
    position: relative;
    margin: 45px;
    cursor: pointer;
    box-shadow: 0 0 20px rgb(119, 119, 119);
}
.container .content .item::before{
    content: "";
    height: 50px;
    width: 50px;
    background-image: url(../images/Play.png);
    position: absolute;
    top: calc(50% - 25px);
    left: calc(50% - 25px);
    z-index: 50;
    transition: all 200ms ease;
    opacity: 0;
}
.container .content .item:hover{
    box-shadow: 0 0 20px rgb(0, 0, 0);
}
.container .content .item:hover img,
.container .content .item:hover::before{
    transform: scale(1.2);
    opacity: 1;
}
.container .content .item img{
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    transition: all ease 200ms;
}
.container .content .item p{
    width: 100%;
    line-height: 40px;
    color: aliceblue;
    text-align: center;
    background-color: rgba(0, 0, 0, .5);
    position: absolute;
    bottom: 0;
}
#video_box{
    background-color: rgba(0, 0, 0, .7);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 200;
    display: none;
}
#video{
    width: 1000px;
    height: 562.5px;
    position: fixed;
    top: calc(50% - 224px);
    left: calc(50% - 500px);
    z-index: 201;
}
#close{
    position: absolute;
    width: 50px;
    height: 50px;
    top: calc(50% - 260px);
    left: calc(50% + 520px);
    background-image: url(../images/close.png);
    z-index: 202;
    transition: all 500ms ease;
    cursor: pointer;
}
#close:hover{
    transform: rotate(180deg);
}